Exercise platform



FIG. 1 is a perspective view, from the top;

FIG. 2. is a top plan view;

FIG. 3 is a side elevation view, the other side being a mirror image;

FIG. 4 is a rear elevation view; and,

FIG. 5 is a front elevation view.

The bottom forms no part of the claimed design. 

The ornamental design for an exercise platform, as shown and described. 